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.TH "PORT\-SELECT" "1" "2\&.11\&.99" "MacPorts 2\&.11\&.99" "MacPorts Manual"
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.SH "NAME"
port-select \- Switch between different implementations of a tool
.SH "SYNOPSIS"
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.nf
\fBport\fR [\fB\-dv\fR] \fBselect\fR \-\-summary
.fi
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.nf
\fBport\fR [\fB\-dv\fR] \fBselect\fR \-\-show \fIgroup\fR
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.nf
\fBport\fR [\fB\-dv\fR] \fBselect\fR [\-\-list] \fIgroup\fR
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.nf
\fBport\fR [\fB\-dv\fR] \fBselect\fR [\-\-set] \fIgroup\fR \fIoption\fR
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.SH "DESCRIPTION"
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\fBport select\fR provides a mechanism to choose from different implementations of a common tool or port\&. Selecting one of the options makes it the primary version or implementation, e\&.g\&. the one to be run by default when you do not explicitly select a version or implementation on the command line\&.
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Note that \fBport select\fR is only for your convenience as user\&. It does not, for example, affect which compiler MacPorts uses when it compiles software, or against which copy of MySQL a port builds\&. If there is a user\-visible choice, it is usually offered as a variant on the port\&. If the \fBport select\fR mechanism affects how a port builds, that should be considered a bug\&.
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One example is the set of MySQL and forks of MySQL, where there are mysql51, mysql55, mysql56, mariadb, mariadb\-10\&.0, mariadb\-11\&.0, percona, possibly among others\&. \fBport select\fR lets you choose which of these becomes the version run, when you simply run \fImysql\fR or other commands from the MySQL suite\&.
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\fBport select\fR has multiple modes of operation: It can display a summary, show the current primary implementation and list all available implementations given a group name, and change the primary implementation\&. See \fBOPTIONS\fR below for details\&.
.SH "OPTIONS"
.PP
\fB\-\-summary\fR
.RS 4
Display a summary of all available selection groups, their current primary implementation and a list of all available choices\&.
.RE
.PP
\fB\-\-show\fR \fIgroup\fR
.RS 4
Print the current primary implementation for the given group\&.
.RE
.PP
\fB\-\-list\fR \fIgroup\fR
.RS 4
Print a list of all currently available choices for the given group\&. This is the default when
\fBport select\fR
is called with one argument\&.
.RE
.PP
\fB\-\-set\fR \fIgroup\fR \fIoption\fR
.RS 4
Make
\fIoption\fR
the primary selection for the
\fIgroup\fR
group\&. This is the default when
\fBport select\fR
is called with two arguments\&.
.RE
.SH "GLOBAL OPTIONS"
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Please see the section \fBGLOBAL OPTIONS\fR in the \fBport\fR(1) man page for a description of global port options\&.
.SH "EXAMPLES"
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If you have both the mysql56 and the percona port installed, you can switch your implementation of the \fImysql\fR command by running
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.if n \{\
.RS 4
.\}
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$> sudo port select \-\-set mysql $option
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.if n \{\
.RE
.\}
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where \fI$option\fR is \fImysql56\fR if you want the version from MySQL, or \fIpercona\fR, if you want the version from Percona\&.
.SH "SEE ALSO"
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\fBport\fR(1)
.SH "AUTHORS"
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.if n \{\
.RS 4
.\}
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(C) 2015 The MacPorts Project
Clemens Lang <cal@macports\&.org>
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